Trapezoid-shaped portion of a rear surface of a golf club head



FIG. 1 is a perspective view of a trapezoid-shaped portion of a rearsurface of a golf club head in accordance with my new design; and,

FIG. 2 is a back view of the trapezoid-shaped portion of a rear surfaceof a golf club head in accordance with my new design.

The broken lines in an area surrounding the trapezoid-shaped portion ofa rear surface of a golf club head in accordance with my new design areillustrative of exemplary golf club heads that show environments inwhich the trapezoid-shaped portion of a rear surface of a golf club headis associated. The exemplary golf club heads do not form a part of theclaimed design.

The ornamental design for a trapezoid-shaped portion of a rear surfaceof a golf club head, as shown.